Equalizing gear for locomotives



Aug. 24,1926. 1,597,509

' v H. A. F. CAMPBELL EQUALIZING GEAR FOR LOCOMOTIVES Fild Feb. 15,; 1926 Patented Aug. 24, 1926.

UNITED STATES PATENT OFFICE.

HARRY A. F. CAMPBELL, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE BALDWIN LOCOMOTIVE WORKS, OF PHILADELEI'IIA, PENNSYLVANIA, A CORPORA- TION OF PENNSYLVANIA.

EQUALIZING GEAR FOR LOCOMOTIVES.

Application filed February My invention relates to certain improvements in equalizing gears for locomotives,

particularly locomotives of the three-cylinder type, although the invention can be applied to other types of locomotives without departing from the essential features of the invention.

The object of the invention is to eliminate the springs over the tops of the boxes of the front driving axles, and to substitute therefor a transverse spring and levers as described hereinafter.

In the accompanying drawings:

Fig. 1 is a sectional view in dotted lines of a locomotive sufiicient to illustrate my invention, the equalizing-gear being in full lines;

Fig. 2 is a sectional view on the line 2-2, Fig. 1; V

Fig. 3 is a detached view of one of the levers;

Fig. 1 is a detached view of the transverse yoke; and

Fig. 5 is a view illustrating a modification.

1 is the frame of the locomotive. 2 are the driving wheels mounted on axles 3. 4: is the cylinder saddle of a three-cylinder locomotive in the present instance, and 5 is the boiler.

Heretofore, it has been customary to locate the spring boxes directly above the front driving wheels of the locomotive. This construction elevates the equalizing mechanism at this point to such an extent as to interfere with the other mechanism of the locomotive.

To overcome this objection, I provide levers 6, which rest directly on the boxes 7 and one end of each lever is attached to a rocker 8 pivoted at 9 to the frame of the locomotive, and connected by a lever 10 and links 11 to the end of a semi-elliptic spring 12, which rests upon the box of the second driving axle from the front.

The levers 6 are arranged in pairs in the present instance, the levers of each pair being on one side of the frame 1, and the others on the opposite side thereof, as clearshown in Fig. 2. The forward end of the levers 6 are notched as at 1 3 to receive the ends 14. of the transvers 1 yaks tee 15, 1926. Serial No. 88,340.

notched as at 16 to receive the projecting ends 14 of the transverse yoke 15. These ends 14 of the yoke are also notched as at 16 to retain the levers in alignment. The yoke is depressed at the center as shown in Figs. 2 and 4, to allow for the movement of the connecting rod of the central cylinder when the device is applied to a threecylinder locomotive.

Attached to the center of the transverse yoke at 16 is a strap 17. of a transverse spring 18, the ends of which rest under the frame 1 of the locomotive as clearly shown in Fig. 2. Straps 19 are secured to the frame and form pockets for the ends of the spring 18, holding the spring in proper alignment. This spring in sometinstances may extend through openings 19 in the frames 1 as illustrated in Fig. 5', without departing from the essential features of the invention. By the above construction, the

mechanism ,at the front of the locomotive does not extend above the to of the main frame Consequently, the mechanism does not interfere with the other parts of the 10- comotive which are located advantageously at this point.

I claim 1. The combination in an equalizing gear for locomotives, of a series of driving axles and boxes therefor; equalizing gears extending-over the boxes to a front equalizing mechanism consisting'of levers resting directly on the boxes and connected at one end to the main equalizing mechanism; a transverse yoke connected at the other end of the levers; and a spring attached to the yoke and bearing upon the main frames of the locomotive.

2. The combination in an equalizing gear for locomotives; a series of driving axles and boxes therefor; levers resting upon the boxes of the front axles; a transverse yoke resting on the forward arms of saidlevers, 

